金泽生态水源湖水库净化效果中试试验研究

Experimental Study on Effect of Ecological Test Tanks to Improve Water Quality

通过构建现场水生态系统中试工程,研究不同库形、水生植被配置以及水力停留时间对水质净化效果的影响。结果表明:浅水区污染物去除效果明显,尤其TP,生长季节浅水净化区去除率达到66%,浅水区净化水质净化效果优于生态净化区和生态蓄水区。停留时间越长,污染物去除率越高,叶绿素越高,藻类生物量越大。从水质净化和藻华防控的角度,水力停留时间5 d左右较优,冬季5~7 d,夏季2~3 d;水库水生植物覆盖率50%左右较为适宜,TP去除率达到80%。

The inflow-outflow investigations are carried out at the ecological test tanks in suite.The effect of reservoir morphology,aquatic ecosystem and resident time on water purification was studied through field test.The results showed that,the removal efficiency of pollutants in pre-dam zone was larger than macrophyte zone and deep water zone,the removal efficiency of TP was 66%.The removal efficiency of pollutants was increased with increasing of resident time,the chlorophyll concentration and algae biomass in test tanks was increased with increasing of resident time.Based on experiment results,it was suggested that the resident time be about 5 days,5~7 days in winter,2~3 days in summer,macrophyte cover be about 50%.